The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 1991
Filed:
Jun. 26, 1989
Akira Kato, Nagoya, JP;
Koji Nagata, Kariya, JP;
Zenji Kuwabara, Nagoya, JP;
Terutada Kojima, Nagoya, JP;
Takashi Yamaguchi, Obu, JP;
Takaaki Ohashi, Komaki, JP;
Masato Hattori, Obu, JP;
Noriyosi Toyoda, Anjo, JP;
Noriaki Kawai, Okazaki, JP;
Teruo Sato, Nagoya, JP;
Toshio Fujimura, Aichi, JP;
Tadashi Watanabe, Toyota, JP;
Mitsumasa Yamada, Mishima, JP;
Tadashi Fukuyama, Susono, JP;
Takeshi Sato, Susono, JP;
Nippondenso CO., Ltd., Kariya, JP;
Abstract
A pilot injection device for a fuel injection pump has an accumulate piston movable in response to a fuel pressure from a pressurizing chamber of the fuel injection pump to cause a pilot injection prior to a main injection by the pump. The device is provided with a back-pressure chamber filled with fuel and having a volume variable by the movement of the accumulate piston. Air trapped in the back-pressure chamber can be removed therefrom through a hole to improve the operation characteristic of the pilot injection device.